| 7306.50.10 | 00 | Having a wall thickness of less than 1.65 mm | kg | Free | | 35% |
| 7306.50.30 | 00 | Having a wall thickness of 1.65 mm or more: | | | | |
| 7306.50.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg | | | |
| 7306.50.50 | 30 | Other, cold-drawn or cold-rolled (cold- reduced) | kg | | | |
| 7306.50.50 | 50 | With an outside diameter not exceeding 114.3 mm | kg | | | |
| 7306.50.50 | 70 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm | kg | | | |
| 7306.61 | | Other, welded, of noncircular cross section: | | | | |
| 7306.61.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.61.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7306.69.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.69.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7307 | | Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel: | | | | |
| 7307.19.30 | 70 | With mechanical, push-on (rubber compression) or flanged joints attached | kg | | | |
| 7307.21.10 | 00 | Not machined, not tooled and not otherwise processed after forging | kg | 3.3% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 34% |
| 7307.22 | | Threaded elbows, bends and sleeves: | | | | |
| 7307.23.00 | 00 | Butt welding fittings | kg | 5% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX,P, SG) | 45% |
| 7307.91.10 | 00 | Not machined, not tooled and not otherwise processed after forging: | | | | |
| 7307.91.50 | 10 | With an inside diameter of less than 360 mm: | | | | |
| 7307.91.50 | 50 | With an inside diameter of 360 mm or more: | | | | |
| 7307.92 | | Threaded elbows, bends and sleeves: | | | | |
| 7307.93 | | Butt welding fittings: | | | | |
| 7307.93.30 | | With an inside diameter of less than 360 mm: | | | | |
| 7307.93.30 | 10 | Not machined, not tooled and not otherwise processed after forging | kg | | | |
| 7307.93.90 | | With an inside diameter of 360 mm or more | | 4.3% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 45% |
| 7307.93.90 | 10 | Not machined, not tooled and not otherwise processed after forging | kg | | | |
Harmonized Tariff Schedule of the United States inquiry: 3920590000
